﻿function showsub_c(id){
		for (i = 0;i<2;i++){
			document.getElementById("tab_c"+i).className = "title1_out";
			document.getElementById("sub_c"+i).style.display = "none";
		}
		document.getElementById("tab_c"+id).className = "title1_over";
		document.getElementById("sub_c"+id).style.display = "";
}